Import SketchUp ".skp" files
There isn't a direct importer for .skp files into Blender. Given your situation of being on linux at the moment, your best option is to get access to a windows machine and export to either .obj or .dae and import into Blender. If you are using the free version of sketchup, you might have to go through a few more steps.

There is an article of an extension on how to do this here.

To run Sketchup on Linux you can use wine for instructions With a web search this was found.

Or perhaps an extension on Sketchup might be http://sketchup2blender.com/blendup-get-started